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  1. Dictionary
    efficacious
    /ˌɛfɪˈkeɪʃəs/

    adjective

    • 1. (of something inanimate or abstract) successful in producing a desired or intended result; effective: formal "this treatment was efficacious in some cases"

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  2. dictionary.cambridge.org › dictionary › englishMeaning of efficacious in English - Cambridge Dictionary

    Efficacious means able to produce the intended result or working well under scientific testing conditions. Learn more about this formal adjective, its synonyms, antonyms, and usage in sentences.

  3. www.merriam-webster.com › dictionary › efficaciousEfficacious Definition & Meaning - Merriam-Webster

    Efficacious means having the power to produce a desired effect. Learn its synonyms, etymology, examples, and usage in medical writing and other contexts.

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  5. www.dictionary.com › browse › efficaciousEFFICACIOUS Definition & Meaning | Dictionary.com

    The adjective efficacious describes things that are capable of having the desired result or effect. But efficacious isn’t quite the same as effectual, effective, or efficient!

  6. www.vocabulary.com › dictionary › efficaciousEfficacious - Definition, Meaning & Synonyms | Vocabulary.com

    When you really want to do something right, really nail it, really get at what you were going for — you're trying to be efficacious, or produce the effect you intended. The word efficacious is made up of the Latin efficere meaning "accomplish" and the suffix -ious meaning "full of."

  7. www.collinsdictionary.com › dictionary › englishEFFICACIOUS definition and meaning | Collins English Dictionary

    Efficacious means effective, capable of producing the desired result or effect. Learn how to use this formal adjective in sentences, and find synonyms and related words in Collins Dictionary.

  8. www.oxfordlearnersdictionaries.com › english › efficaciousefficacious adjective - Definition, pictures, pronunciation and...

    Definition of efficacious adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

  9. dictionary.cambridge.org › dictionary › englishMeaning of efficacy in English - Cambridge Dictionary

    Efficacy is the ability of something to produce the intended result or the quality of being effective. Learn more about the meaning, synonyms, related words and examples of efficacy from Cambridge Dictionary.